We can answer that in several ways.
If 52 is the 100%, then 520 is ten times that, which is 10*100%, therefore, 520 is 1000% of 52
We also can use a rule of three, simple, direct proportion to solve it:
52 ------> 100%
520 -----> x
x = (520)(100)/52
x = 1000
therefore 520 is the 1000% of 52
